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# Determine whether recent-enough GNU Make is being used.
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# Copyright (C) 2007, 2009, 2010 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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# Written by Paul Eggert.
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# Set GNU_MAKE if we are using a recent-enough version of GNU make.
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# Use --version AND trailing junk, because SGI Make doesn't fail on --version.
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AC_DEFUN([gl_GNU_MAKE],
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AM_CONDITIONAL([GNU_MAKE],
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[${MAKE-make} --version /cannot/make/this >/dev/null 2>&1])